Tension device for shuttles



April 7, 1925.

Q P. SHANNON TENSION DEVICE FOR SHUTTLES Filed Dec. 18, 1923 WITNESSES i ATTORNEYS Y Patented Apr. 7, 1925.

1,533,031 m" orrice.

PAUL SHANNON, 0F NORWTCH, CONNECTICUT.

TENSiON DEVICE non SHUTTLES.

Application filed December 18, 1923. Serial No. 681,392.

T 0 all whom it may concern: I

'Be it known that I, PAUL SHANNON, a citizen of the United States, and a resident of Norwich, in.the county of New London and Statev of Connecticut, have invented a new and Improved Tension Device for Shuttles, of which the following is' a full, clear, and exact description.

This invention relates to improvements in shuttles for looms, and has particular reference to a tension device therefor.

In tension devices for looms it is customary to employ a movable tensioning member and cooperating stationary guide members, such as pins, about which the thread is alternately passed, the movement of the firstna-med member being utilized to maintain the thread under proper tension as the shuttle is operated. The operation of threading these devices is oftentimes a tedious and difficult'one owingto the relative arrangement of the parts. g I

An object of the present invention is to provide an improved tension device which is so constructed as to facilitate the threading thereof. l z

Another object is to utilize the movement of the movable tensioning member from its normal position to engage the thread with the stationary guide members whenthe device' is being threaded so that said thread will pass alternately or back and forth from various portions of the movable member to each of the guide members.

The above and other objects will appear more clearly from the following detailed description when taken in connection with the accompanying drawing which illustrates a preferred embodiment of the inventive idea.

In the drawing- Figure 1 is a plan view of the shuttle constructed in accordance with the invention;

Figure 2 is a fragmentary longitudinal section on the line 22 of Figure 3;

Figure 3 is a similar View on the line 3-3 of Figure 1; 4

Figure 4 is a transverse section on the. line 44 of Figure 3; and

Figure 5 is a similar; of Figure 3.

The shuttle 6 is constructed in a manner well known in the art and provided with means for properly positioning the bobbin 7. Adjacent one end of the shuttle the same is provided with a recess for receiving the view on the line 55 'vice is being threaccd.

casing 8 of the tensioning device which includesthe essential features of the present 1nvent1on.- i .Q

The movable tensioning member forming a part of the tension device is generally indicated by the numeral 9 and is formed of a single length of wire or other suitable material which is bent at one end to provide a l1elical coil 10 which is mounted upon a. p vot pin llwhen the member is in its operative position. The extremity of the' wire adjacent the coil has connected. thereto one end of a suitable elastic member 12, the other end of which is secured in the shuttle as at 13, and said member 12 operates to yieldingly maintain the member '9 in the normal fullline position shown in Figure 2. The portion of the wire forming the member 9 adjacent the end thereof opposite the coil 10 is bent to provide a series of guide loops 14 each of which is offset with respect to the next adjacent loops so, that said loops will be arranged in staggered relation to form a channelthrough which the thread 15 may be extended. Each loop maybe bent outwardlyjas best indicated at 16, (Flgure 1) so as to facilitate the introduction of the thread into the channel formed by said loops when the tension de- When the member 9 1s m its normal'position, as shown in full lines in Figures 4 and 5, the bent portions 16 of the loops are arranged outwardly be- I yond the turndown guide extensions 17 of the casing 8. Thus when a thread is being introduced into the casing the same may be engaged with-said-extensions 17 which will guide the same into the loops 14, as illustrated in Figure 4, the thread being forced to the inner or lower ends of the loops.

Cooperating with-the movable member 9 are a plurality of stationary guides 18 sup- .ported upon thebase of the casing 8 and positioned so as not to interfere with the loops 14 of the me'mber9 when the latter is moved about its pivot 11 when the shuttle is being operated. The guides 18 are of sucv cessively increasing size from the inner guide which is next adjacent the pivot end of the member 9 so that. the eft'ective'ends of said guides with which the-thread is brought into'engagement are arranged on a ine extending diagonally with respect to the longitudinal axis of the tension device.

This constructionis clearly shown in Figure 2. Each guide 18 is provided with-an inclined edge 19 arranged in such manner that after the thread hasbeen introduced into the loops 14 and the'member 9 is swung about its pivot to the dotted-line position I shown in Figures 2 and4, the thread 15 will engage said'inclined edges and thereby be I guidedioverthe guides 18, after which the threading under tension durin shuttle. In order t at any dan r of the thread 'will assume the position, as indicated in Figure 4; Upon the restoration of the member 9 to its normal position the thread will then be alternately en aged with the loops 14 and guides 1.8, as sliown in Figure 2. It will thus be apparent that the invention provides an effective means for quickly which w ll at all times maintain the thread the operation of the thread being engaged with the coils 1O during the operation of'the shuttle will be obviated a pin 20 is arranged adjacent the pivot 11' so as'to be engaged by the thread as the member 9 is moved to its dotted-line position. Vhat is claimed is: 1. In a tension devi plurality of stationary guide members, and a move 1 withsaid guide members'and having a channel in which v a thread is engaged whenthreading the device, the movement of said tensioningmember being utilized to also en- 7 gage said thread with said guide members to' 1 complete the threading operation. I 2. In a tension device for shuttles, a movable tensioning member formed with a series of loops forming a channel for receiving a thread therein, and a plural ty of stationary guide members arranged in the path of movement of said movable .member and en- -gaged by the thread extending through said loocps so that said thread will extend back an forth between the loops of the tension- :ing member and said stationary members.

the tension device, the parts of for shuttles; a-

e tensioning member cooperating.

when the latter is restored to its normal position said thread will extend back" and forth between the loops of the pivoted member and said stationary members.

4. In a tension device for shuttles, a movable tensioning member formed from a sin,

gle length of material bentat one end to provide a coil which forms a pivot for said member and also bent adjacent its other end to provide'a plurality of aligned loops for receivin a thread when the device isbeing threaded, a plurality of stationary guide members capable of beingengaged by said threadv when said tensioning member is moved about said coil as a pivot so that said thread will; be engaged alternately with'said jlo0(ps and said stationary guide members;

means to revent engagen'ient of said thread with sa dmoil when said tensioning member is moved about its pivot.

5. In a tension device for shuttles, a plurality of stationary .guides. a movable tensioning member formed of a single length of wire formed at one end with a helical coil and provided with a plurality of loopsarranged in staggered relation to one another v to form a channel for the thread, a pin upon which the coil is mounted, and ,an elastic member secured to the shuttle and to the end of the wire adjacent the coil.

PAULSHANNON. 

